WAREHOUSE AND OTHER LINES OF CREDIT - Information on Warehouse Borrowings (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Line of Credit Facility [Line Items]
Loans held for sale, at fair value	$ 4,656,338		$ 4,656,338		$ 8,136,817
Warehouse Agreement Borrowings
Line of Credit Facility [Line Items]
Maximum outstanding balance during the period	6,407,547	$ 9,180,276	7,672,559	$ 9,180,276
Average balance outstanding during the period	$ 4,928,772	$ 8,164,737	$ 5,605,996	$ 7,838,140
Weighted average interest rate during the period	2.60%	2.21%	2.27%	2.27%
Warehouse Agreement Borrowings \| Pledged as Collateral
Line of Credit Facility [Line Items]
Loans held for sale, at fair value	$ 4,408,362	$ 8,919,427	$ 4,408,362	$ 8,919,427

The average effective interest rate during the reporting period.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1F
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495355-112611

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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Average amount borrowed under the credit facility during the period.

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Maximum amount borrowed under the credit facility at any time during the period.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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